Automated tracking in digitized videofluoroscopy sequences for spine kinematic analysis

  • Authors:
  • Shing Chun Benny Lam;Brendan McCane;Robert Allen

  • Affiliations:
  • Institute of Sound and Vibration Research, University of Southampton, Southampton SO17 1BJ, UK;Department of Computer Science, University of Otago, Dunedin, New Zealand;Institute of Sound and Vibration Research, University of Southampton, Southampton SO17 1BJ, UK

  • Venue:
  • Image and Vision Computing
  • Year:
  • 2009

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Abstract

Spine kinematic analysis provides useful information to aid understanding of the segmental motion of the vertebrae. Digitized videofluoroscopy (DVF) is the existing practical modality to image spine motion for kinematic data acquisition. However, obtaining kinematic parameters from DVF sequence requires manual landmarking which is a laborious process and can be subjective and error prone. This work develops an automated spine motion tracking algorithm for DVF sequences within a Bayesian framework. By utilizing the anatomical relationships between vertebrae, a dynamic Bayesian network with a particle filter at each node is constructed. The proposed algorithm overcomes the dimensionality problem in a regular particle filter and has more efficient and robust performance. It can provide results of about 1^o and 2pixels (0.2mm) variability in rotation and translation estimation, respectively, during repeated initialization analysis on sequences from simulation and in vivo healthy human subject studies.